/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.phoenix.end2end;

import static org.apache.phoenix.util.TestUtil.ROW1;
import static org.apache.phoenix.util.TestUtil.ROW2;
import static org.apache.phoenix.util.TestUtil.ROW3;
import static org.apache.phoenix.util.TestUtil.ROW4;
import static org.apache.phoenix.util.TestUtil.ROW5;
import static org.apache.phoenix.util.TestUtil.ROW6;
import static org.apache.phoenix.util.TestUtil.ROW7;
import static org.apache.phoenix.util.TestUtil.ROW8;
import static org.apache.phoenix.util.TestUtil.ROW9;
import static org.apache.phoenix.util.TestUtil.TEST_PROPERTIES;
import static org.apache.phoenix.util.TestUtil.assertResultSet;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties;
import org.apache.phoenix.compile.ExplainPlan;
import org.apache.phoenix.compile.ExplainPlanAttributes;
import org.apache.phoenix.jdbc.PhoenixPreparedStatement;
import org.apache.phoenix.query.QueryServices;
import org.apache.phoenix.util.PropertiesUtil;
import org.apache.phoenix.util.QueryBuilder;
import org.apache.phoenix.util.SchemaUtil;
import org.apache.phoenix.util.TestUtil;
import org.junit.Before;
import org.junit.Test;

import org.apache.phoenix.thirdparty.com.google.common.collect.Lists;

public abstract class BaseOrderByIT extends ParallelStatsDisabledIT {

  Properties props;

  @Before
  public void setup() {
    props = PropertiesUtil.deepCopy(TEST_PROPERTIES);
    props.setProperty(QueryServices.PHOENIX_SERVER_PAGE_SIZE_MS, Long.toString(0));
  }

  @Test
  public void testMultiOrderByExpr() throws Exception {
    String tenantId = getOrganizationId();
    String tableName = initATableValues(tenantId, getDefaultSplits(tenantId), getUrl());
    QueryBuilder queryBuilder =
      new QueryBuilder().setSelectColumns(Lists.newArrayList("ENTITY_ID", "B_STRING"))
        .setFullTableName(tableName).setOrderByClause("B_STRING, ENTITY_ID");

    try (Connection conn = DriverManager.getConnection(getUrl(), props)) {
      ResultSet rs = executeQuery(conn, queryBuilder);
      assertTrue(rs.next());
      assertEquals(ROW1, rs.getString(1));
      assertTrue(rs.next());
      assertEquals(ROW4, rs.getString(1));
      assertTrue(rs.next());
      assertEquals(ROW7, rs.getString(1));
      assertTrue(rs.next());
      assertEquals(ROW2, rs.getString(1));
      assertTrue(rs.next());
      assertEquals(ROW5, rs.getString(1));
      assertTrue(rs.next());
      assertEquals(ROW8, rs.getString(1));
      assertTrue(rs.next());
      assertEquals(ROW3, rs.getString(1));
      assertTrue(rs.next());
      assertEquals(ROW6, rs.getString(1));
      assertTrue(rs.next());
      assertEquals(ROW9, rs.getString(1));

      assertFalse(rs.next());
    }
  }

  @Test
  public void testDescMultiOrderByExpr() throws Exception {
    String tenantId = getOrganizationId();
    String tableName = initATableValues(tenantId, getDefaultSplits(tenantId), getUrl());
    QueryBuilder queryBuilder =
      new QueryBuilder().setSelectColumns(Lists.newArrayList("ENTITY_ID", "B_STRING"))
        .setFullTableName(tableName).setOrderByClause("B_STRING || ENTITY_ID DESC");
    try (Connection conn = DriverManager.getConnection(getUrl(), props)) {
      ResultSet rs = executeQuery(conn, queryBuilder);
      assertTrue(rs.next());
      assertEquals(ROW9, rs.getString(1));
      assertTrue(rs.next());
      assertEquals(ROW6, rs.getString(1));
      assertTrue(rs.next());
      assertEquals(ROW3, rs.getString(1));
      assertTrue(rs.next());
      assertEquals(ROW8, rs.getString(1));
      assertTrue(rs.next());
      assertEquals(ROW5, rs.getString(1));
      assertTrue(rs.next());
      assertEquals(ROW2, rs.getString(1));
      assertTrue(rs.next());
      assertEquals(ROW7, rs.getString(1));
      assertTrue(rs.next());
      assertEquals(ROW4, rs.getString(1));
      assertTrue(rs.next());
      assertEquals(ROW1, rs.getString(1));

      assertFalse(rs.next());
    }
  }

  @Test
  public void testOrderByDifferentColumns() throws Exception {
    try (Connection conn = DriverManager.getConnection(getUrl(), props)) {
      conn.setAutoCommit(false);
      String tableName = generateUniqueName();
      String ddl = "CREATE TABLE " + tableName + "  (a_string varchar not null, col1 integer"
        + "  CONSTRAINT pk PRIMARY KEY (a_string))\n";
      createTestTable(getUrl(), ddl);

      String dml = "UPSERT INTO " + tableName + " VALUES(?, ?)";
      PreparedStatement stmt = conn.prepareStatement(dml);
      stmt.setString(1, "a");
      stmt.setInt(2, 40);
      stmt.execute();
      stmt.setString(1, "b");
      stmt.setInt(2, 20);
      stmt.execute();
      stmt.setString(1, "c");
      stmt.setInt(2, 30);
      stmt.execute();
      conn.commit();

      QueryBuilder queryBuilder =
        new QueryBuilder().setSelectColumns(Lists.newArrayList("COL1")).setFullTableName(tableName)
          .setSelectExpression("count(*)").setGroupByClause("COL1").setOrderByClause("COL1");
      ResultSet rs = executeQuery(conn, queryBuilder);
      assertTrue(rs.next());
      assertEquals(1, rs.getLong(1));
      assertTrue(rs.next());
      assertEquals(1, rs.getLong(1));
      assertTrue(rs.next());
      assertEquals(1, rs.getLong(1));
      assertFalse(rs.next());

      queryBuilder = new QueryBuilder();
      queryBuilder.setSelectColumns(Lists.newArrayList("A_STRING", "COL1"));
      queryBuilder.setFullTableName(tableName);
      queryBuilder.setOrderByClause("A_STRING");
      rs = executeQuery(conn, queryBuilder);
      assertTrue(rs.next());
      assertEquals("a", rs.getString(1));
      assertEquals(40, rs.getInt(2));
      assertTrue(rs.next());
      assertEquals("b", rs.getString(1));
      assertEquals(20, rs.getInt(2));
      assertTrue(rs.next());
      assertEquals("c", rs.getString(1));
      assertEquals(30, rs.getInt(2));
      assertFalse(rs.next());

      queryBuilder.setSelectColumns(Lists.newArrayList("A_STRING", "COL1"));
      queryBuilder.setFullTableName(tableName);
      queryBuilder.setOrderByClause("COL1");
      rs = executeQuery(conn, queryBuilder);
      assertTrue(rs.next());
      assertEquals("b", rs.getString(1));
      assertEquals(20, rs.getInt(2));
      assertTrue(rs.next());
      assertEquals("c", rs.getString(1));
      assertEquals(30, rs.getInt(2));
      assertTrue(rs.next());
      assertEquals("a", rs.getString(1));
      assertEquals(40, rs.getInt(2));
      assertFalse(rs.next());
    }
  }

  @Test
  public void testAggregateOrderBy() throws Exception {
    Connection conn = DriverManager.getConnection(getUrl(), props);
    String tableName = generateUniqueName();
    String ddl = "create table " + tableName
      + " (ID VARCHAR NOT NULL PRIMARY KEY, VAL1 VARCHAR, VAL2 INTEGER)";
    conn.createStatement().execute(ddl);

    conn.createStatement().execute("upsert into " + tableName + " values ('ABC','aa123', 11)");
    conn.createStatement().execute("upsert into " + tableName + " values ('ABD','ba124', 1)");
    conn.createStatement().execute("upsert into " + tableName + " values ('ABE','cf125', 13)");
    conn.createStatement().execute("upsert into " + tableName + " values ('ABF','dan126', 4)");
    conn.createStatement().execute("upsert into " + tableName + " values ('ABG','elf127', 15)");
    conn.createStatement().execute("upsert into " + tableName + " values ('ABH','fan128', 6)");
    conn.createStatement().execute("upsert into " + tableName + " values ('AAA','get211', 100)");
    conn.createStatement().execute("upsert into " + tableName + " values ('AAB','hat212', 7)");
    conn.createStatement().execute("upsert into " + tableName + " values ('AAC','aap12', 2)");
    conn.createStatement().execute("upsert into " + tableName + " values ('AAD','ball12', 3)");
    conn.createStatement().execute("upsert into " + tableName + " values ('AAE','inn2110', 13)");
    conn.createStatement().execute("upsert into " + tableName + " values ('AAF','key2112', 40)");
    conn.commit();

    QueryBuilder queryBuilder =
      new QueryBuilder().setSelectColumns(Lists.newArrayList("VAL1", "VAL2"))
        .setFullTableName(tableName).setOrderByClause("VAL1").setSelectExpression("DISTINCT(ID)")
        .setSelectExpressionColumns(Lists.newArrayList("ID")).setWhereClause(
          "ID in ('ABC','ABD','ABE','ABF','ABG','ABH','AAA', 'AAB', 'AAC','AAD','AAE','AAF')");
    ResultSet rs = executeQuery(conn, queryBuilder);
    assertTrue(rs.next());
    assertEquals("ABC", rs.getString(1));
    assertEquals("aa123", rs.getString(2));
    assertTrue(rs.next());
    assertEquals("aap12", rs.getString(2));
    assertTrue(rs.next());
    assertEquals("ba124", rs.getString(2));
    assertTrue(rs.next());
    assertEquals("ball12", rs.getString(2));
    assertTrue(rs.next());
    assertEquals("cf125", rs.getString(2));
    assertTrue(rs.next());
    assertEquals("dan126", rs.getString(2));
    assertTrue(rs.next());
    assertEquals("elf127", rs.getString(2));
    assertTrue(rs.next());
    assertEquals("fan128", rs.getString(2));
    assertTrue(rs.next());
    assertEquals("get211", rs.getString(2));
    assertTrue(rs.next());
    assertEquals("hat212", rs.getString(2));
    assertTrue(rs.next());
    assertEquals("inn2110", rs.getString(2));
    assertTrue(rs.next());
    assertEquals("AAF", rs.getString(1));
    assertEquals("key2112", rs.getString(2));
    assertFalse(rs.next());
  }

  @Test
  public void testAggregateOptimizedOutOrderBy() throws Exception {
    Connection conn = DriverManager.getConnection(getUrl(), props);
    String tableName = generateUniqueName();
    String ddl = "create table " + tableName
      + " (K1 VARCHAR NOT NULL, K2 VARCHAR NOT NULL, VAL1 VARCHAR, VAL2 INTEGER, CONSTRAINT pk PRIMARY KEY(K1,K2))";
    conn.createStatement().execute(ddl);

    conn.createStatement()
      .execute("upsert into " + tableName + " values ('ABC','ABC','aa123', 11)");
    conn.createStatement().execute("upsert into " + tableName + " values ('ABD','ABC','ba124', 1)");
    conn.createStatement()
      .execute("upsert into " + tableName + " values ('ABE','ABC','cf125', 13)");
    conn.createStatement()
      .execute("upsert into " + tableName + " values ('ABF','ABC','dan126', 4)");
    conn.createStatement()
      .execute("upsert into " + tableName + " values ('ABG','ABC','elf127', 15)");
    conn.createStatement()
      .execute("upsert into " + tableName + " values ('ABH','ABC','fan128', 6)");
    conn.createStatement()
      .execute("upsert into " + tableName + " values ('AAA','ABC','get211', 100)");
    conn.createStatement()
      .execute("upsert into " + tableName + " values ('AAB','ABC','hat212', 7)");
    conn.createStatement().execute("upsert into " + tableName + " values ('AAC','ABC','aap12', 2)");
    conn.createStatement()
      .execute("upsert into " + tableName + " values ('AAD','ABC','ball12', 3)");
    conn.createStatement()
      .execute("upsert into " + tableName + " values ('AAE','ABC','inn2110', 13)");
    conn.createStatement()
      .execute("upsert into " + tableName + " values ('AAF','ABC','key2112', 40)");
    conn.commit();

    QueryBuilder queryBuilder = new QueryBuilder()
      .setSelectColumns(Lists.newArrayList("VAL1", "VAL2")).setFullTableName(tableName)
      .setOrderByClause("VAL1").setSelectExpressionColumns(Lists.newArrayList("K2"))
      .setSelectExpression("DISTINCT(K2)").setWhereClause("K2 = 'ABC'");

    // verify that the phoenix query plan doesn't contain an order by
    ExplainPlan plan = conn.prepareStatement(queryBuilder.build())
      .unwrap(PhoenixPreparedStatement.class).optimizeQuery().getExplainPlan();
    ExplainPlanAttributes explainPlanAttributes = plan.getPlanStepsAsAttributes();
    assertEquals("PARALLEL 1-WAY", explainPlanAttributes.getIteratorTypeAndScanSize());
    assertEquals("FULL SCAN ", explainPlanAttributes.getExplainScanType());
    assertEquals(tableName, explainPlanAttributes.getTableName());
    assertEquals("SERVER FILTER BY K2 = 'ABC'", explainPlanAttributes.getServerWhereFilter());
    assertEquals("SERVER AGGREGATE INTO DISTINCT ROWS BY [K2, VAL1, VAL2]",
      explainPlanAttributes.getServerAggregate());
    assertEquals("CLIENT MERGE SORT", explainPlanAttributes.getClientSortAlgo());
    assertNull(explainPlanAttributes.getClientSortedBy());
    assertNull(explainPlanAttributes.getServerSortedBy());

    ResultSet rs = executeQuery(conn, queryBuilder);
    assertTrue(rs.next());
    assertEquals("ABC", rs.getString(1));
    assertEquals("aa123", rs.getString(2));
    assertTrue(rs.next());
    assertEquals("aap12", rs.getString(2));
    assertTrue(rs.next());
    assertEquals("ba124", rs.getString(2));
    assertTrue(rs.next());
    assertEquals("ball12", rs.getString(2));
    assertTrue(rs.next());
    assertEquals("cf125", rs.getString(2));
    assertTrue(rs.next());
    assertEquals("dan126", rs.getString(2));
    assertTrue(rs.next());
    assertEquals("elf127", rs.getString(2));
    assertTrue(rs.next());
    assertEquals("fan128", rs.getString(2));
    assertTrue(rs.next());
    assertEquals("get211", rs.getString(2));
    assertTrue(rs.next());
    assertEquals("hat212", rs.getString(2));
    assertTrue(rs.next());
    assertEquals("inn2110", rs.getString(2));
    assertTrue(rs.next());
    assertEquals("ABC", rs.getString(1));
    assertEquals("key2112", rs.getString(2));
    assertFalse(rs.next());
  }

  @Test
  public void testNullsLastWithDesc() throws Exception {
    try (Connection conn = DriverManager.getConnection(getUrl(), props)) {
      String tableName = generateUniqueName();
      String sql =
        "CREATE TABLE " + tableName + " ( " + "ORGANIZATION_ID VARCHAR," + "CONTAINER_ID VARCHAR,"
          + "ENTITY_ID VARCHAR NOT NULL," + "CONSTRAINT TEST_PK PRIMARY KEY ( "
          + "ORGANIZATION_ID DESC," + "CONTAINER_ID DESC," + "ENTITY_ID" + "))";
      conn.createStatement().execute(sql);

      conn.createStatement().execute("UPSERT INTO " + tableName + " VALUES ('a',null,'11')");
      conn.createStatement().execute("UPSERT INTO " + tableName + " VALUES (null,'2','22')");
      conn.createStatement().execute("UPSERT INTO " + tableName + " VALUES ('c','3','33')");
      conn.commit();

      // -----ORGANIZATION_ID

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by ORGANIZATION_ID ASC
      // NULLS FIRST";
      QueryBuilder queryBuilder =
        new QueryBuilder().setSelectColumns(Lists.newArrayList("CONTAINER_ID", "ORGANIZATION_ID"))
          .setFullTableName(tableName).setOrderByClause("ORGANIZATION_ID ASC NULLS FIRST");
      ResultSet rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs, new String[][] { { "2", null }, { null, "a" }, { "3", "c" }, });

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by ORGANIZATION_ID ASC
      // NULLS LAST";
      queryBuilder.setOrderByClause("ORGANIZATION_ID ASC NULLS LAST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs, new String[][] { { null, "a" }, { "3", "c" }, { "2", null } });

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by ORGANIZATION_ID DESC
      // NULLS FIRST";
      queryBuilder.setOrderByClause("ORGANIZATION_ID DESC NULLS FIRST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs, new String[][] { { "2", null }, { "3", "c" }, { null, "a" } });

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by ORGANIZATION_ID DESC
      // NULLS LAST";
      queryBuilder.setOrderByClause("ORGANIZATION_ID DESC NULLS LAST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs, new String[][] { { "3", "c" }, { null, "a" }, { "2", null } });

      // ----CONTAINER_ID

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by CONTAINER_ID ASC NULLS
      // FIRST";
      queryBuilder.setOrderByClause("CONTAINER_ID ASC NULLS FIRST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs, new String[][] { { null, "a" }, { "2", null }, { "3", "c" } });

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by CONTAINER_ID ASC NULLS
      // LAST";
      queryBuilder.setOrderByClause("CONTAINER_ID ASC NULLS LAST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs, new String[][] { { "2", null }, { "3", "c" }, { null, "a" } });

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by CONTAINER_ID DESC
      // NULLS FIRST";
      queryBuilder.setOrderByClause("CONTAINER_ID DESC NULLS FIRST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs, new String[][] { { null, "a" }, { "3", "c" }, { "2", null } });

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by CONTAINER_ID DESC
      // NULLS LAST";
      queryBuilder.setOrderByClause("CONTAINER_ID DESC NULLS LAST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs, new String[][] { { "3", "c" }, { "2", null }, { null, "a" } });

      conn.createStatement().execute("UPSERT INTO " + tableName + " VALUES (null,null,'44')");
      conn.commit();

      // -----ORGANIZATION_ID ASC CONTAINER_ID ASC

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by ORGANIZATION_ID NULLS
      // FIRST,CONTAINER_ID NULLS FIRST";
      queryBuilder.setOrderByClause("ORGANIZATION_ID NULLS FIRST,CONTAINER_ID NULLS FIRST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new String[][] { { null, null }, { "2", null }, { null, "a" }, { "3", "c" } });

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by ORGANIZATION_ID NULLS
      // FIRST,CONTAINER_ID NULLS LAST";
      queryBuilder.setOrderByClause("ORGANIZATION_ID NULLS FIRST,CONTAINER_ID NULLS LAST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new String[][] { { "2", null }, { null, null }, { null, "a" }, { "3", "c" } });

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by ORGANIZATION_ID NULLS
      // LAST,CONTAINER_ID NULLS FIRST";
      queryBuilder.setOrderByClause("ORGANIZATION_ID NULLS LAST,CONTAINER_ID NULLS FIRST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new String[][] { { null, "a" }, { "3", "c" }, { null, null }, { "2", null } });

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by ORGANIZATION_ID NULLS
      // LAST,CONTAINER_ID NULLS LAST";
      queryBuilder.setOrderByClause("ORGANIZATION_ID NULLS LAST,CONTAINER_ID NULLS LAST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new String[][] { { null, "a" }, { "3", "c" }, { "2", null }, { null, null } });

      // -----ORGANIZATION_ID ASC CONTAINER_ID DESC

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by ORGANIZATION_ID NULLS
      // FIRST,CONTAINER_ID DESC NULLS FIRST";
      queryBuilder.setOrderByClause("ORGANIZATION_ID NULLS FIRST,CONTAINER_ID DESC NULLS FIRST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new String[][] { { null, null }, { "2", null }, { null, "a" }, { "3", "c" } });

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by ORGANIZATION_ID NULLS
      // FIRST,CONTAINER_ID DESC NULLS LAST";
      queryBuilder.setOrderByClause("ORGANIZATION_ID NULLS FIRST,CONTAINER_ID DESC NULLS LAST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new String[][] { { "2", null }, { null, null }, { null, "a" }, { "3", "c" } });

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by ORGANIZATION_ID NULLS
      // LAST,CONTAINER_ID DESC NULLS FIRST";
      queryBuilder.setOrderByClause("ORGANIZATION_ID NULLS LAST,CONTAINER_ID DESC NULLS FIRST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new String[][] { { null, "a" }, { "3", "c" }, { null, null }, { "2", null } });

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by ORGANIZATION_ID NULLS
      // LAST,CONTAINER_ID DESC NULLS LAST";
      queryBuilder.setOrderByClause("ORGANIZATION_ID NULLS LAST,CONTAINER_ID DESC NULLS LAST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new String[][] { { null, "a" }, { "3", "c" }, { "2", null }, { null, null } });

      // -----ORGANIZATION_ID DESC CONTAINER_ID ASC

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by ORGANIZATION_ID DESC
      // NULLS FIRST,CONTAINER_ID NULLS FIRST";
      queryBuilder.setOrderByClause("ORGANIZATION_ID DESC NULLS FIRST,CONTAINER_ID NULLS FIRST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new String[][] { { null, null }, { "2", null }, { "3", "c" }, { null, "a" } });

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by ORGANIZATION_ID DESC
      // NULLS FIRST,CONTAINER_ID NULLS LAST";
      queryBuilder.setOrderByClause("ORGANIZATION_ID DESC NULLS FIRST,CONTAINER_ID NULLS LAST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new String[][] { { "2", null }, { null, null }, { "3", "c" }, { null, "a" } });

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by ORGANIZATION_ID DESC
      // NULLS LAST,CONTAINER_ID NULLS FIRST";
      queryBuilder.setOrderByClause("ORGANIZATION_ID DESC NULLS LAST,CONTAINER_ID NULLS FIRST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new String[][] { { "3", "c" }, { null, "a" }, { null, null }, { "2", null } });

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by ORGANIZATION_ID DESC
      // NULLS LAST,CONTAINER_ID NULLS LAST";
      queryBuilder.setOrderByClause("ORGANIZATION_ID DESC NULLS LAST,CONTAINER_ID NULLS LAST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new String[][] { { "3", "c" }, { null, "a" }, { "2", null }, { null, null } });

      // -----ORGANIZATION_ID DESC CONTAINER_ID DESC

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by ORGANIZATION_ID DESC
      // NULLS FIRST,CONTAINER_ID DESC NULLS FIRST";
      queryBuilder
        .setOrderByClause("ORGANIZATION_ID DESC NULLS FIRST,CONTAINER_ID DESC NULLS FIRST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new String[][] { { null, null }, { "2", null }, { "3", "c" }, { null, "a" } });

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by ORGANIZATION_ID DESC
      // NULLS FIRST,CONTAINER_ID DESC NULLS LAST";
      queryBuilder
        .setOrderByClause("ORGANIZATION_ID DESC NULLS FIRST,CONTAINER_ID DESC NULLS LAST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new String[][] { { "2", null }, { null, null }, { "3", "c" }, { null, "a" } });

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by ORGANIZATION_ID DESC
      // NULLS LAST,CONTAINER_ID DESC NULLS FIRST";
      queryBuilder
        .setOrderByClause("ORGANIZATION_ID DESC NULLS LAST,CONTAINER_ID DESC NULLS FIRST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new String[][] { { "3", "c" }, { null, "a" }, { null, null }, { "2", null } });

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by ORGANIZATION_ID DESC
      // NULLS LAST,CONTAINER_ID DESC NULLS LAST";
      queryBuilder.setOrderByClause("ORGANIZATION_ID DESC NULLS LAST,CONTAINER_ID DESC NULLS LAST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new String[][] { { "3", "c" }, { null, "a" }, { "2", null }, { null, null } });

      // -----CONTAINER_ID ASC ORGANIZATION_ID ASC

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by CONTAINER_ID NULLS
      // FIRST,ORGANIZATION_ID NULLS FIRST";
      queryBuilder.setOrderByClause("CONTAINER_ID NULLS FIRST,ORGANIZATION_ID NULLS FIRST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new String[][] { { null, null }, { null, "a" }, { "2", null }, { "3", "c" } });

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by CONTAINER_ID NULLS
      // FIRST,ORGANIZATION_ID NULLS LAST";
      queryBuilder.setOrderByClause("CONTAINER_ID NULLS FIRST,ORGANIZATION_ID NULLS LAST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new String[][] { { null, "a" }, { null, null }, { "2", null }, { "3", "c" } });

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by CONTAINER_ID NULLS
      // LAST,ORGANIZATION_ID NULLS FIRST";
      queryBuilder.setOrderByClause("CONTAINER_ID NULLS LAST,ORGANIZATION_ID NULLS FIRST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new String[][] { { "2", null }, { "3", "c" }, { null, null }, { null, "a" } });

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by CONTAINER_ID NULLS
      // LAST,ORGANIZATION_ID NULLS LAST";
      queryBuilder.setOrderByClause("CONTAINER_ID NULLS LAST,ORGANIZATION_ID NULLS LAST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new String[][] { { "2", null }, { "3", "c" }, { null, "a" }, { null, null } });

      // -----CONTAINER_ID ASC ORGANIZATION_ID DESC

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by CONTAINER_ID ASC NULLS
      // FIRST,ORGANIZATION_ID DESC NULLS FIRST";
      queryBuilder
        .setOrderByClause("CONTAINER_ID ASC NULLS FIRST,ORGANIZATION_ID DESC NULLS FIRST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new String[][] { { null, null }, { null, "a" }, { "2", null }, { "3", "c" } });

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by CONTAINER_ID ASC NULLS
      // FIRST,ORGANIZATION_ID DESC NULLS LAST";
      queryBuilder.setOrderByClause("CONTAINER_ID ASC NULLS FIRST,ORGANIZATION_ID DESC NULLS LAST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new String[][] { { null, "a" }, { null, null }, { "2", null }, { "3", "c" } });

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by CONTAINER_ID ASC NULLS
      // LAST,ORGANIZATION_ID DESC NULLS FIRST";
      queryBuilder.setOrderByClause("CONTAINER_ID ASC NULLS LAST,ORGANIZATION_ID DESC NULLS FIRST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new String[][] { { "2", null }, { "3", "c" }, { null, null }, { null, "a" } });

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by CONTAINER_ID ASC NULLS
      // LAST,ORGANIZATION_ID DESC NULLS LAST";
      queryBuilder.setOrderByClause("CONTAINER_ID ASC NULLS LAST,ORGANIZATION_ID DESC NULLS LAST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new String[][] { { "2", null }, { "3", "c" }, { null, "a" }, { null, null } });

      // -----CONTAINER_ID DESC ORGANIZATION_ID ASC

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by CONTAINER_ID DESC
      // NULLS FIRST,ORGANIZATION_ID ASC NULLS FIRST";
      queryBuilder
        .setOrderByClause("CONTAINER_ID DESC NULLS FIRST,ORGANIZATION_ID ASC NULLS FIRST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new String[][] { { null, null }, { null, "a" }, { "3", "c" }, { "2", null } });

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by CONTAINER_ID DESC
      // NULLS FIRST,ORGANIZATION_ID ASC NULLS LAST";
      queryBuilder.setOrderByClause("CONTAINER_ID DESC NULLS FIRST,ORGANIZATION_ID ASC NULLS LAST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new String[][] { { null, "a" }, { null, null }, { "3", "c" }, { "2", null } });

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by CONTAINER_ID DESC
      // NULLS LAST,ORGANIZATION_ID ASC NULLS FIRST";
      queryBuilder.setOrderByClause("CONTAINER_ID DESC NULLS LAST,ORGANIZATION_ID ASC NULLS FIRST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new String[][] { { "3", "c" }, { "2", null }, { null, null }, { null, "a" } });

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by CONTAINER_ID DESC
      // NULLS LAST,ORGANIZATION_ID ASC NULLS LAST";
      queryBuilder.setOrderByClause("CONTAINER_ID DESC NULLS LAST,ORGANIZATION_ID ASC NULLS LAST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new String[][] { { "3", "c" }, { "2", null }, { null, "a" }, { null, null } });

      // -----CONTAINER_ID DESC ORGANIZATION_ID DESC

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by CONTAINER_ID DESC
      // NULLS FIRST,ORGANIZATION_ID DESC NULLS FIRST";
      queryBuilder
        .setOrderByClause("CONTAINER_ID DESC NULLS FIRST,ORGANIZATION_ID DESC NULLS FIRST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new String[][] { { null, null }, { null, "a" }, { "3", "c" }, { "2", null } });

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by CONTAINER_ID DESC
      // NULLS FIRST,ORGANIZATION_ID DESC NULLS LAST";
      queryBuilder
        .setOrderByClause("CONTAINER_ID DESC NULLS FIRST,ORGANIZATION_ID DESC NULLS LAST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new String[][] { { null, "a" }, { null, null }, { "3", "c" }, { "2", null } });

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by CONTAINER_ID DESC
      // NULLS LAST,ORGANIZATION_ID DESC NULLS FIRST";
      queryBuilder
        .setOrderByClause("CONTAINER_ID DESC NULLS LAST,ORGANIZATION_ID DESC NULLS FIRST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new String[][] { { "3", "c" }, { "2", null }, { null, null }, { null, "a" } });

      // sql="SELECT CONTAINER_ID,ORGANIZATION_ID FROM "+tableName+" order by CONTAINER_ID DESC
      // NULLS LAST,ORGANIZATION_ID DESC NULLS LAST";
      queryBuilder.setOrderByClause("CONTAINER_ID DESC NULLS LAST,ORGANIZATION_ID DESC NULLS LAST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new String[][] { { "3", "c" }, { "2", null }, { null, "a" }, { null, null } });
    }
  }

  @Test
  public void testOrderByReverseOptimization() throws Exception {
    for (boolean salted : new boolean[] { true, false }) {
      doTestOrderByReverseOptimization(salted, true, true, true);
      doTestOrderByReverseOptimization(salted, true, true, false);
      doTestOrderByReverseOptimization(salted, true, false, true);
      doTestOrderByReverseOptimization(salted, true, false, false);
      doTestOrderByReverseOptimization(salted, false, true, true);
      doTestOrderByReverseOptimization(salted, false, true, false);
      doTestOrderByReverseOptimization(salted, false, false, true);
      doTestOrderByReverseOptimization(salted, false, false, false);
    }
  }

  private void doTestOrderByReverseOptimization(boolean salted, boolean desc1, boolean desc2,
    boolean desc3) throws Exception {
    try (Connection conn = DriverManager.getConnection(getUrl(), props)) {
      String tableName = generateUniqueName();
      String sql = "CREATE TABLE " + tableName + " ( " + "ORGANIZATION_ID INTEGER NOT NULL,"
        + "CONTAINER_ID INTEGER NOT NULL," + "SCORE INTEGER NOT NULL,"
        + "ENTITY_ID INTEGER NOT NULL," + "CONSTRAINT TEST_PK PRIMARY KEY ( " + "ORGANIZATION_ID"
        + (desc1 ? " DESC" : "") + "," + "CONTAINER_ID" + (desc2 ? " DESC" : "") + "," + "SCORE"
        + (desc3 ? " DESC" : "") + "," + "ENTITY_ID" + ")) "
        + (salted ? "SALT_BUCKETS =4" : "split on(4)");
      conn.createStatement().execute(sql);

      conn.createStatement().execute("UPSERT INTO " + tableName + " VALUES (1,1,1,1)");
      conn.createStatement().execute("UPSERT INTO " + tableName + " VALUES (2,2,2,2)");
      conn.createStatement().execute("UPSERT INTO " + tableName + " VALUES (3,3,3,3)");
      conn.createStatement().execute("UPSERT INTO " + tableName + " VALUES (4,4,4,4)");
      conn.createStatement().execute("UPSERT INTO " + tableName + " VALUES (5,5,5,5)");
      conn.createStatement().execute("UPSERT INTO " + tableName + " VALUES (6,6,6,6)");
      conn.createStatement().execute("UPSERT INTO " + tableName + " VALUES (1,1,1,11)");
      conn.createStatement().execute("UPSERT INTO " + tableName + " VALUES (2,2,2,22)");
      conn.createStatement().execute("UPSERT INTO " + tableName + " VALUES (3,3,3,33)");
      conn.createStatement().execute("UPSERT INTO " + tableName + " VALUES (4,4,4,44)");
      conn.createStatement().execute("UPSERT INTO " + tableName + " VALUES (5,5,5,55)");
      conn.createStatement().execute("UPSERT INTO " + tableName + " VALUES (6,6,6,66)");
      conn.commit();

      QueryBuilder queryBuilder =
        new QueryBuilder().setSelectColumns(Lists.newArrayList("CONTAINER_ID", "ORGANIZATION_ID"))
          .setFullTableName(tableName).setGroupByClause("ORGANIZATION_ID, CONTAINER_ID")
          .setOrderByClause("ORGANIZATION_ID ASC, CONTAINER_ID ASC");
      // groupBy orderPreserving orderBy asc asc
      // sql="SELECT ORGANIZATION_ID,CONTAINER_ID FROM "+tableName+" group by ORGANIZATION_ID,
      // CONTAINER_ID ORDER BY ORGANIZATION_ID ASC, CONTAINER_ID ASC";
      ResultSet rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { 1, 1 }, { 2, 2 }, { 3, 3 }, { 4, 4 }, { 5, 5 }, { 6, 6 } });

      // groupBy orderPreserving orderBy asc desc
      // sql="SELECT ORGANIZATION_ID,CONTAINER_ID FROM "+tableName+" group by ORGANIZATION_ID,
      // CONTAINER_ID ORDER BY ORGANIZATION_ID ASC, CONTAINER_ID desc";
      queryBuilder.setOrderByClause("ORGANIZATION_ID ASC, CONTAINER_ID DESC");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { 1, 1 }, { 2, 2 }, { 3, 3 }, { 4, 4 }, { 5, 5 }, { 6, 6 } });

      // groupBy orderPreserving orderBy desc asc
      // sql="SELECT ORGANIZATION_ID,CONTAINER_ID FROM "+tableName+" group by ORGANIZATION_ID,
      // CONTAINER_ID ORDER BY ORGANIZATION_ID DESC, CONTAINER_ID ASC";
      queryBuilder.setOrderByClause("ORGANIZATION_ID DESC, CONTAINER_ID ASC");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { 6, 6 }, { 5, 5 }, { 4, 4 }, { 3, 3 }, { 2, 2 }, { 1, 1 } });

      // groupBy orderPreserving orderBy desc desc
      // sql="SELECT ORGANIZATION_ID,CONTAINER_ID FROM "+tableName+" group by ORGANIZATION_ID,
      // CONTAINER_ID ORDER BY ORGANIZATION_ID DESC, CONTAINER_ID DESC";
      queryBuilder.setOrderByClause("ORGANIZATION_ID DESC, CONTAINER_ID DESC");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { 6, 6 }, { 5, 5 }, { 4, 4 }, { 3, 3 }, { 2, 2 }, { 1, 1 } });

      // groupBy not orderPreserving orderBy asc asc
      // sql="SELECT ORGANIZATION_ID,SCORE FROM "+tableName+" group by ORGANIZATION_ID, SCORE ORDER
      // BY ORGANIZATION_ID ASC, SCORE ASC";
      queryBuilder.setSelectColumns(Lists.newArrayList("ORGANIZATION_ID", "SCORE"));
      queryBuilder.setGroupByClause("ORGANIZATION_ID, SCORE");
      queryBuilder.setOrderByClause("ORGANIZATION_ID ASC, SCORE ASC");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { 1, 1 }, { 2, 2 }, { 3, 3 }, { 4, 4 }, { 5, 5 }, { 6, 6 } });

      // groupBy not orderPreserving orderBy asc desc
      // sql="SELECT ORGANIZATION_ID,SCORE FROM "+tableName+" group by ORGANIZATION_ID, SCORE ORDER
      // BY ORGANIZATION_ID ASC, SCORE DESC";
      queryBuilder.setGroupByClause("ORGANIZATION_ID, SCORE");
      queryBuilder.setOrderByClause("ORGANIZATION_ID ASC, SCORE DESC");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { 1, 1 }, { 2, 2 }, { 3, 3 }, { 4, 4 }, { 5, 5 }, { 6, 6 } });

      // groupBy not orderPreserving orderBy desc asc
      // sql="SELECT ORGANIZATION_ID,SCORE FROM "+tableName+" group by ORGANIZATION_ID, SCORE ORDER
      // BY ORGANIZATION_ID DESC, SCORE ASC";
      queryBuilder.setGroupByClause("ORGANIZATION_ID, SCORE");
      queryBuilder.setOrderByClause("ORGANIZATION_ID DESC, SCORE ASC");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { 6, 6 }, { 5, 5 }, { 4, 4 }, { 3, 3 }, { 2, 2 }, { 1, 1 } });

      // groupBy not orderPreserving orderBy desc desc
      // sql="SELECT ORGANIZATION_ID,SCORE FROM "+tableName+" group by ORGANIZATION_ID, SCORE ORDER
      // BY ORGANIZATION_ID DESC, SCORE DESC";
      queryBuilder.setGroupByClause("ORGANIZATION_ID, SCORE");
      queryBuilder.setOrderByClause("ORGANIZATION_ID DESC, SCORE DESC");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { 6, 6 }, { 5, 5 }, { 4, 4 }, { 3, 3 }, { 2, 2 }, { 1, 1 } });
    }
  }

  @Test
  public void testOrderByReverseOptimizationWithNullsLast() throws Exception {
    for (boolean salted : new boolean[] { true, false }) {
      doTestOrderByReverseOptimizationWithNullsLast(salted, true, true, true);
      doTestOrderByReverseOptimizationWithNullsLast(salted, true, true, false);
      doTestOrderByReverseOptimizationWithNullsLast(salted, true, false, true);
      doTestOrderByReverseOptimizationWithNullsLast(salted, true, false, false);
      doTestOrderByReverseOptimizationWithNullsLast(salted, false, true, true);
      doTestOrderByReverseOptimizationWithNullsLast(salted, false, true, false);
      doTestOrderByReverseOptimizationWithNullsLast(salted, false, false, true);
      doTestOrderByReverseOptimizationWithNullsLast(salted, false, false, false);
    }
  }

  private void doTestOrderByReverseOptimizationWithNullsLast(boolean salted, boolean desc1,
    boolean desc2, boolean desc3) throws Exception {
    try (Connection conn = DriverManager.getConnection(getUrl(), props)) {
      String tableName = generateUniqueName();
      String sql = "CREATE TABLE " + tableName + " ( " + "ORGANIZATION_ID VARCHAR,"
        + "CONTAINER_ID VARCHAR," + "SCORE VARCHAR," + "ENTITY_ID VARCHAR NOT NULL,"
        + "CONSTRAINT TEST_PK PRIMARY KEY ( " + "ORGANIZATION_ID" + (desc1 ? " DESC" : "") + ","
        + "CONTAINER_ID" + (desc2 ? " DESC" : "") + "," + "SCORE" + (desc3 ? " DESC" : "") + ","
        + "ENTITY_ID" + ")) " + (salted ? "SALT_BUCKETS =4" : "split on('4')");
      conn.createStatement().execute(sql);

      for (int i = 1; i <= 6; i++) {
        conn.createStatement().execute(
          "UPSERT INTO " + tableName + " VALUES (null,'" + i + "','" + i + "','" + i + "')");
        conn.createStatement()
          .execute("UPSERT INTO " + tableName + " VALUES (null,'" + i + "',null,'" + i + "')");
        conn.createStatement()
          .execute("UPSERT INTO " + tableName + " VALUES (null,null,'" + i + "','" + i + "')");
        conn.createStatement()
          .execute("UPSERT INTO " + tableName + " VALUES (null,null,null,'" + i + "')");
        conn.createStatement().execute(
          "UPSERT INTO " + tableName + " VALUES ('" + i + "','" + i + "','" + i + "','" + i + "')");
        conn.createStatement().execute(
          "UPSERT INTO " + tableName + " VALUES ('" + i + "','" + i + "',null,'" + i + "')");
        conn.createStatement().execute(
          "UPSERT INTO " + tableName + " VALUES ('" + i + "',null,'" + i + "','" + i + "')");
        conn.createStatement()
          .execute("UPSERT INTO " + tableName + " VALUES ('" + i + "',null,null,'" + i + "')");
      }
      conn.createStatement().execute("UPSERT INTO " + tableName + " VALUES (null,null,null,'66')");
      conn.commit();

      // groupBy orderPreserving orderBy asc asc

      // sql="SELECT ORGANIZATION_ID,CONTAINER_ID FROM "+tableName+" group by ORGANIZATION_ID,
      // CONTAINER_ID ORDER BY ORGANIZATION_ID ASC NULLS FIRST, CONTAINER_ID ASC NULLS FIRST";
      QueryBuilder queryBuilder =
        new QueryBuilder().setSelectColumns(Lists.newArrayList("ORGANIZATION_ID", "CONTAINER_ID"))
          .setFullTableName(tableName).setGroupByClause("ORGANIZATION_ID, CONTAINER_ID")
          .setOrderByClause("ORGANIZATION_ID ASC NULLS FIRST, CONTAINER_ID ASC NULLS FIRST");
      ResultSet rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { null, null }, { null, "1" }, { null, "2" }, { null, "3" }, { null, "4" },
          { null, "5" }, { null, "6" }, { "1", null }, { "1", "1" }, { "2", null }, { "2", "2" },
          { "3", null }, { "3", "3" }, { "4", null }, { "4", "4" }, { "5", null }, { "5", "5" },
          { "6", null }, { "6", "6" } });

      // sql="SELECT ORGANIZATION_ID,CONTAINER_ID FROM "+tableName+" group by ORGANIZATION_ID,
      // CONTAINER_ID ORDER BY ORGANIZATION_ID ASC NULLS FIRST, CONTAINER_ID ASC NULLS LAST";
      queryBuilder.setOrderByClause("ORGANIZATION_ID ASC NULLS FIRST, CONTAINER_ID ASC NULLS LAST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { null, "1" }, { null, "2" }, { null, "3" }, { null, "4" }, { null, "5" },
          { null, "6" }, { null, null }, { "1", "1" }, { "1", null }, { "2", "2" }, { "2", null },
          { "3", "3" }, { "3", null }, { "4", "4" }, { "4", null }, { "5", "5" }, { "5", null },
          { "6", "6" }, { "6", null } });

      // sql="SELECT ORGANIZATION_ID,CONTAINER_ID FROM "+tableName+" group by ORGANIZATION_ID,
      // CONTAINER_ID ORDER BY ORDER BY ORGANIZATION_ID ASC NULLS FIRST, CONTAINER_ID ASC NULLS
      // LAST";
      queryBuilder.setOrderByClause("ORGANIZATION_ID ASC NULLS FIRST, CONTAINER_ID ASC NULLS LAST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { null, "1" }, { null, "2" }, { null, "3" }, { null, "4" }, { null, "5" },
          { null, "6" }, { null, null }, { "1", "1" }, { "1", null }, { "2", "2" }, { "2", null },
          { "3", "3" }, { "3", null }, { "4", "4" }, { "4", null }, { "5", "5" }, { "5", null },
          { "6", "6" }, { "6", null } });

      // sql="SELECT ORGANIZATION_ID,CONTAINER_ID FROM "+tableName+" group by ORGANIZATION_ID,
      // CONTAINER_ID ORDER BY ORGANIZATION_ID ASC NULLS LAST, CONTAINER_ID ASC NULLS LAST";
      queryBuilder.setOrderByClause("ORGANIZATION_ID ASC NULLS LAST, CONTAINER_ID ASC NULLS LAST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { "1", "1" }, { "1", null }, { "2", "2" }, { "2", null }, { "3", "3" },
          { "3", null }, { "4", "4" }, { "4", null }, { "5", "5" }, { "5", null }, { "6", "6" },
          { "6", null }, { null, "1" }, { null, "2" }, { null, "3" }, { null, "4" }, { null, "5" },
          { null, "6" }, { null, null } });

      // groupBy orderPreserving orderBy asc desc

      // sql="SELECT ORGANIZATION_ID,CONTAINER_ID FROM "+tableName+" group by ORGANIZATION_ID,
      // CONTAINER_ID ORDER BY ORGANIZATION_ID ASC NULLS FIRST, CONTAINER_ID DESC NULLS FIRST";
      queryBuilder
        .setOrderByClause("ORGANIZATION_ID ASC NULLS FIRST, CONTAINER_ID DESC NULLS FIRST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { null, null }, { null, "6" }, { null, "5" }, { null, "4" }, { null, "3" },
          { null, "2" }, { null, "1" }, { "1", null }, { "1", "1" }, { "2", null }, { "2", "2" },
          { "3", null }, { "3", "3" }, { "4", null }, { "4", "4" }, { "5", null }, { "5", "5" },
          { "6", null }, { "6", "6" } });

      // sql="SELECT ORGANIZATION_ID,CONTAINER_ID FROM "+tableName+" group by ORGANIZATION_ID,
      // CONTAINER_ID ORDER BY ORGANIZATION_ID ASC NULLS FIRST, CONTAINER_ID DESC NULLS LAST";
      queryBuilder
        .setOrderByClause("ORGANIZATION_ID ASC NULLS FIRST, CONTAINER_ID DESC NULLS LAST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { null, "6" }, { null, "5" }, { null, "4" }, { null, "3" }, { null, "2" },
          { null, "1" }, { null, null }, { "1", "1" }, { "1", null }, { "2", "2" }, { "2", null },
          { "3", "3" }, { "3", null }, { "4", "4" }, { "4", null }, { "5", "5" }, { "5", null },
          { "6", "6" }, { "6", null } });

      // sql="SELECT ORGANIZATION_ID,CONTAINER_ID FROM "+tableName+" group by ORGANIZATION_ID,
      // CONTAINER_ID ORDER BY ORGANIZATION_ID ASC NULLS LAST, CONTAINER_ID DESC NULLS FIRST";
      queryBuilder
        .setOrderByClause("ORGANIZATION_ID ASC NULLS LAST, CONTAINER_ID DESC NULLS FIRST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { "1", null }, { "1", "1" }, { "2", null }, { "2", "2" }, { "3", null },
          { "3", "3" }, { "4", null }, { "4", "4" }, { "5", null }, { "5", "5" }, { "6", null },
          { "6", "6" }, { null, null }, { null, "6" }, { null, "5" }, { null, "4" }, { null, "3" },
          { null, "2" }, { null, "1" } });

      // sql="SELECT ORGANIZATION_ID,CONTAINER_ID FROM "+tableName+" group by ORGANIZATION_ID,
      // CONTAINER_ID ORDER BY ORGANIZATION_ID ASC NULLS LAST, CONTAINER_ID DESC NULLS LAST";
      queryBuilder.setOrderByClause("ORGANIZATION_ID ASC NULLS LAST, CONTAINER_ID DESC NULLS LAST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { "1", "1" }, { "1", null }, { "2", "2" }, { "2", null }, { "3", "3" },
          { "3", null }, { "4", "4" }, { "4", null }, { "5", "5" }, { "5", null }, { "6", "6" },
          { "6", null }, { null, "6" }, { null, "5" }, { null, "4" }, { null, "3" }, { null, "2" },
          { null, "1" }, { null, null } });

      // groupBy orderPreserving orderBy desc asc

      // sql="SELECT ORGANIZATION_ID,CONTAINER_ID FROM "+tableName+" group by ORGANIZATION_ID,
      // CONTAINER_ID ORDER BY ORGANIZATION_ID DESC NULLS FIRST, CONTAINER_ID ASC NULLS FIRST";
      queryBuilder
        .setOrderByClause("ORGANIZATION_ID DESC NULLS FIRST, CONTAINER_ID ASC NULLS FIRST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { null, null }, { null, "1" }, { null, "2" }, { null, "3" }, { null, "4" },
          { null, "5" }, { null, "6" }, { "6", null }, { "6", "6" }, { "5", null }, { "5", "5" },
          { "4", null }, { "4", "4" }, { "3", null }, { "3", "3" }, { "2", null }, { "2", "2" },
          { "1", null }, { "1", "1" } });

      // sql="SELECT ORGANIZATION_ID,CONTAINER_ID FROM "+tableName+" group by ORGANIZATION_ID,
      // CONTAINER_ID ORDER BY ORGANIZATION_ID DESC NULLS FIRST, CONTAINER_ID ASC NULLS LAST";
      queryBuilder
        .setOrderByClause("ORGANIZATION_ID DESC NULLS FIRST, CONTAINER_ID ASC NULLS LAST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { null, "1" }, { null, "2" }, { null, "3" }, { null, "4" }, { null, "5" },
          { null, "6" }, { null, null }, { "6", "6" }, { "6", null }, { "5", "5" }, { "5", null },
          { "4", "4" }, { "4", null }, { "3", "3" }, { "3", null }, { "2", "2" }, { "2", null },
          { "1", "1" }, { "1", null } });

      // sql="SELECT ORGANIZATION_ID,CONTAINER_ID FROM "+tableName+" group by ORGANIZATION_ID,
      // CONTAINER_ID ORDER BY ORGANIZATION_ID DESC NULLS LAST, CONTAINER_ID ASC NULLS FIRST";
      queryBuilder
        .setOrderByClause("ORGANIZATION_ID DESC NULLS LAST, CONTAINER_ID ASC NULLS FIRST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { "6", null }, { "6", "6" }, { "5", null }, { "5", "5" }, { "4", null },
          { "4", "4" }, { "3", null }, { "3", "3" }, { "2", null }, { "2", "2" }, { "1", null },
          { "1", "1" }, { null, null }, { null, "1" }, { null, "2" }, { null, "3" }, { null, "4" },
          { null, "5" }, { null, "6" } });

      // sql="SELECT ORGANIZATION_ID,CONTAINER_ID FROM "+tableName+" group by ORGANIZATION_ID,
      // CONTAINER_ID ORDER BY ORGANIZATION_ID DESC NULLS LAST, CONTAINER_ID ASC NULLS LAST";
      queryBuilder.setOrderByClause("ORGANIZATION_ID DESC NULLS LAST, CONTAINER_ID ASC NULLS LAST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { "6", "6" }, { "6", null }, { "5", "5" }, { "5", null }, { "4", "4" },
          { "4", null }, { "3", "3" }, { "3", null }, { "2", "2" }, { "2", null }, { "1", "1" },
          { "1", null }, { null, "1" }, { null, "2" }, { null, "3" }, { null, "4" }, { null, "5" },
          { null, "6" }, { null, null } });

      // groupBy orderPreserving orderBy desc desc

      // sql="SELECT ORGANIZATION_ID,CONTAINER_ID FROM "+tableName+" group by ORGANIZATION_ID,
      // CONTAINER_ID ORDER BY ORGANIZATION_ID DESC NULLS FIRST, CONTAINER_ID DESC NULLS FIRST";
      queryBuilder
        .setOrderByClause("ORGANIZATION_ID DESC NULLS FIRST, CONTAINER_ID DESC NULLS FIRST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { null, null }, { null, "6" }, { null, "5" }, { null, "4" }, { null, "3" },
          { null, "2" }, { null, "1" }, { "6", null }, { "6", "6" }, { "5", null }, { "5", "5" },
          { "4", null }, { "4", "4" }, { "3", null }, { "3", "3" }, { "2", null }, { "2", "2" },
          { "1", null }, { "1", "1" } });

      // sql="SELECT ORGANIZATION_ID,CONTAINER_ID FROM "+tableName+" group by ORGANIZATION_ID,
      // CONTAINER_ID ORDER BY ORGANIZATION_ID DESC NULLS FIRST, CONTAINER_ID DESC NULLS LAST";
      queryBuilder
        .setOrderByClause("ORGANIZATION_ID DESC NULLS FIRST, CONTAINER_ID DESC NULLS LAST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { null, "6" }, { null, "5" }, { null, "4" }, { null, "3" }, { null, "2" },
          { null, "1" }, { null, null }, { "6", "6" }, { "6", null }, { "5", "5" }, { "5", null },
          { "4", "4" }, { "4", null }, { "3", "3" }, { "3", null }, { "2", "2" }, { "2", null },
          { "1", "1" }, { "1", null } });

      // sql="SELECT ORGANIZATION_ID,CONTAINER_ID FROM "+tableName+" group by ORGANIZATION_ID,
      // CONTAINER_ID ORDER BY ORGANIZATION_ID DESC NULLS LAST, CONTAINER_ID DESC NULLS FIRST";
      queryBuilder
        .setOrderByClause("ORGANIZATION_ID DESC NULLS LAST, CONTAINER_ID DESC NULLS FIRST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { "6", null }, { "6", "6" }, { "5", null }, { "5", "5" }, { "4", null },
          { "4", "4" }, { "3", null }, { "3", "3" }, { "2", null }, { "2", "2" }, { "1", null },
          { "1", "1" }, { null, null }, { null, "6" }, { null, "5" }, { null, "4" }, { null, "3" },
          { null, "2" }, { null, "1" } });

      // sql="SELECT ORGANIZATION_ID,CONTAINER_ID FROM "+tableName+" group by ORGANIZATION_ID,
      // CONTAINER_ID ORDER BY ORGANIZATION_ID DESC NULLS LAST, CONTAINER_ID DESC NULLS LAST";
      queryBuilder
        .setOrderByClause("ORGANIZATION_ID DESC NULLS LAST, CONTAINER_ID DESC NULLS LAST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { "6", "6" }, { "6", null }, { "5", "5" }, { "5", null }, { "4", "4" },
          { "4", null }, { "3", "3" }, { "3", null }, { "2", "2" }, { "2", null }, { "1", "1" },
          { "1", null }, { null, "6" }, { null, "5" }, { null, "4" }, { null, "3" }, { null, "2" },
          { null, "1" }, { null, null } });

      // -----groupBy not orderPreserving--

      // groupBy not orderPreserving orderBy asc asc

      // sql="SELECT ORGANIZATION_ID,SCORE FROM "+tableName+" group by ORGANIZATION_ID, SCORE ORDER
      // BY ORGANIZATION_ID ASC NULLS FIRST, SCORE ASC NULLS FIRST";
      queryBuilder.setSelectColumns(Lists.newArrayList("ORGANIZATION_ID", "SCORE"))
        .setFullTableName(tableName).setGroupByClause("ORGANIZATION_ID, SCORE")
        .setOrderByClause("ORGANIZATION_ID ASC NULLS FIRST, SCORE ASC NULLS FIRST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { null, null }, { null, "1" }, { null, "2" }, { null, "3" }, { null, "4" },
          { null, "5" }, { null, "6" }, { "1", null }, { "1", "1" }, { "2", null }, { "2", "2" },
          { "3", null }, { "3", "3" }, { "4", null }, { "4", "4" }, { "5", null }, { "5", "5" },
          { "6", null }, { "6", "6" } });

      // sql="SELECT ORGANIZATION_ID,SCORE FROM "+tableName+" group by ORGANIZATION_ID, SCORE ORDER
      // BY ORGANIZATION_ID ASC NULLS FIRST, SCORE ASC NULLS LAST";
      queryBuilder.setOrderByClause("ORGANIZATION_ID ASC NULLS FIRST, SCORE ASC NULLS LAST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { null, "1" }, { null, "2" }, { null, "3" }, { null, "4" }, { null, "5" },
          { null, "6" }, { null, null }, { "1", "1" }, { "1", null }, { "2", "2" }, { "2", null },
          { "3", "3" }, { "3", null }, { "4", "4" }, { "4", null }, { "5", "5" }, { "5", null },
          { "6", "6" }, { "6", null } });

      // sql="SELECT ORGANIZATION_ID,SCORE FROM "+tableName+" group by ORGANIZATION_ID, SCORE ORDER
      // BY ORGANIZATION_ID ASC NULLS LAST, SCORE ASC NULLS FIRST";
      queryBuilder.setOrderByClause("ORGANIZATION_ID ASC NULLS LAST, SCORE ASC NULLS FIRST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { "1", null }, { "1", "1" }, { "2", null }, { "2", "2" }, { "3", null },
          { "3", "3" }, { "4", null }, { "4", "4" }, { "5", null }, { "5", "5" }, { "6", null },
          { "6", "6" }, { null, null }, { null, "1" }, { null, "2" }, { null, "3" }, { null, "4" },
          { null, "5" }, { null, "6" } });

      // sql="SELECT ORGANIZATION_ID,SCORE FROM "+tableName+" group by ORGANIZATION_ID, SCORE ORDER
      // BY ORGANIZATION_ID ASC NULLS LAST, SCORE ASC NULLS LAST";
      queryBuilder.setOrderByClause("ORGANIZATION_ID ASC NULLS LAST, SCORE ASC NULLS LAST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { "1", "1" }, { "1", null }, { "2", "2" }, { "2", null }, { "3", "3" },
          { "3", null }, { "4", "4" }, { "4", null }, { "5", "5" }, { "5", null }, { "6", "6" },
          { "6", null }, { null, "1" }, { null, "2" }, { null, "3" }, { null, "4" }, { null, "5" },
          { null, "6" }, { null, null } });

      // groupBy not orderPreserving orderBy asc desc

      // sql="SELECT ORGANIZATION_ID,SCORE FROM "+tableName+" group by ORGANIZATION_ID, SCORE ORDER
      // BY ORGANIZATION_ID ASC NULLS FIRST, SCORE DESC NULLS FIRST";
      queryBuilder.setOrderByClause("ORGANIZATION_ID ASC NULLS FIRST, SCORE DESC NULLS FIRST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { null, null }, { null, "6" }, { null, "5" }, { null, "4" }, { null, "3" },
          { null, "2" }, { null, "1" }, { "1", null }, { "1", "1" }, { "2", null }, { "2", "2" },
          { "3", null }, { "3", "3" }, { "4", null }, { "4", "4" }, { "5", null }, { "5", "5" },
          { "6", null }, { "6", "6" } });

      // sql="SELECT ORGANIZATION_ID,SCORE FROM "+tableName+" group by ORGANIZATION_ID, SCORE ORDER
      // BY ORGANIZATION_ID ASC NULLS FIRST, SCORE DESC NULLS LAST";
      queryBuilder.setOrderByClause("ORGANIZATION_ID ASC NULLS FIRST, SCORE DESC NULLS LAST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { null, "6" }, { null, "5" }, { null, "4" }, { null, "3" }, { null, "2" },
          { null, "1" }, { null, null }, { "1", "1" }, { "1", null }, { "2", "2" }, { "2", null },
          { "3", "3" }, { "3", null }, { "4", "4" }, { "4", null }, { "5", "5" }, { "5", null },
          { "6", "6" }, { "6", null } });

      // sql="SELECT ORGANIZATION_ID,SCORE FROM "+tableName+" group by ORGANIZATION_ID, SCORE ORDER
      // BY ORGANIZATION_ID ASC NULLS LAST, SCORE DESC NULLS FIRST";
      queryBuilder.setOrderByClause("ORGANIZATION_ID ASC NULLS LAST, SCORE DESC NULLS FIRST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { "1", null }, { "1", "1" }, { "2", null }, { "2", "2" }, { "3", null },
          { "3", "3" }, { "4", null }, { "4", "4" }, { "5", null }, { "5", "5" }, { "6", null },
          { "6", "6" }, { null, null }, { null, "6" }, { null, "5" }, { null, "4" }, { null, "3" },
          { null, "2" }, { null, "1" } });

      // sql="SELECT ORGANIZATION_ID,SCORE FROM "+tableName+" group by ORGANIZATION_ID, SCORE ORDER
      // BY ORGANIZATION_ID ASC NULLS LAST, SCORE DESC NULLS LAST";
      queryBuilder.setOrderByClause("ORGANIZATION_ID ASC NULLS LAST, SCORE DESC NULLS LAST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { "1", "1" }, { "1", null }, { "2", "2" }, { "2", null }, { "3", "3" },
          { "3", null }, { "4", "4" }, { "4", null }, { "5", "5" }, { "5", null }, { "6", "6" },
          { "6", null }, { null, "6" }, { null, "5" }, { null, "4" }, { null, "3" }, { null, "2" },
          { null, "1" }, { null, null } });

      // groupBy not orderPreserving orderBy desc asc

      // sql="SELECT ORGANIZATION_ID,SCORE FROM "+tableName+" group by ORGANIZATION_ID, SCORE ORDER
      // BY ORGANIZATION_ID DESC NULLS FIRST, SCORE ASC NULLS FIRST";
      queryBuilder.setOrderByClause("ORGANIZATION_ID DESC NULLS FIRST, SCORE ASC NULLS FIRST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { null, null }, { null, "1" }, { null, "2" }, { null, "3" }, { null, "4" },
          { null, "5" }, { null, "6" }, { "6", null }, { "6", "6" }, { "5", null }, { "5", "5" },
          { "4", null }, { "4", "4" }, { "3", null }, { "3", "3" }, { "2", null }, { "2", "2" },
          { "1", null }, { "1", "1" } });

      // sql="SELECT ORGANIZATION_ID,SCORE FROM "+tableName+" group by ORGANIZATION_ID, SCORE ORDER
      // BY ORGANIZATION_ID DESC NULLS FIRST, SCORE ASC NULLS LAST";
      queryBuilder.setOrderByClause("ORGANIZATION_ID DESC NULLS FIRST, SCORE ASC NULLS LAST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { null, "1" }, { null, "2" }, { null, "3" }, { null, "4" }, { null, "5" },
          { null, "6" }, { null, null }, { "6", "6" }, { "6", null }, { "5", "5" }, { "5", null },
          { "4", "4" }, { "4", null }, { "3", "3" }, { "3", null }, { "2", "2" }, { "2", null },
          { "1", "1" }, { "1", null } });

      // sql="SELECT ORGANIZATION_ID,SCORE FROM "+tableName+" group by ORGANIZATION_ID, SCORE ORDER
      // BY ORGANIZATION_ID DESC NULLS LAST, SCORE ASC NULLS FIRST";
      queryBuilder.setOrderByClause("ORGANIZATION_ID DESC NULLS LAST, SCORE ASC NULLS FIRST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { "6", null }, { "6", "6" }, { "5", null }, { "5", "5" }, { "4", null },
          { "4", "4" }, { "3", null }, { "3", "3" }, { "2", null }, { "2", "2" }, { "1", null },
          { "1", "1" }, { null, null }, { null, "1" }, { null, "2" }, { null, "3" }, { null, "4" },
          { null, "5" }, { null, "6" } });

      // sql="SELECT ORGANIZATION_ID,SCORE FROM "+tableName+" group by ORGANIZATION_ID, SCORE ORDER
      // BY ORGANIZATION_ID DESC NULLS LAST, SCORE ASC NULLS LAST";
      queryBuilder.setOrderByClause("ORGANIZATION_ID DESC NULLS LAST, SCORE ASC NULLS LAST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { "6", "6" }, { "6", null }, { "5", "5" }, { "5", null }, { "4", "4" },
          { "4", null }, { "3", "3" }, { "3", null }, { "2", "2" }, { "2", null }, { "1", "1" },
          { "1", null }, { null, "1" }, { null, "2" }, { null, "3" }, { null, "4" }, { null, "5" },
          { null, "6" }, { null, null } });

      // groupBy not orderPreserving orderBy desc desc

      // sql="SELECT ORGANIZATION_ID,SCORE FROM "+tableName+" group by ORGANIZATION_ID, SCORE ORDER
      // BY ORGANIZATION_ID DESC NULLS FIRST, SCORE DESC NULLS FIRST";
      queryBuilder.setOrderByClause("ORGANIZATION_ID DESC NULLS FIRST, SCORE DESC NULLS FIRST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { null, null }, { null, "6" }, { null, "5" }, { null, "4" }, { null, "3" },
          { null, "2" }, { null, "1" }, { "6", null }, { "6", "6" }, { "5", null }, { "5", "5" },
          { "4", null }, { "4", "4" }, { "3", null }, { "3", "3" }, { "2", null }, { "2", "2" },
          { "1", null }, { "1", "1" } });

      // sql="SELECT ORGANIZATION_ID,SCORE FROM "+tableName+" group by ORGANIZATION_ID, SCORE ORDER
      // BY ORGANIZATION_ID DESC NULLS FIRST, SCORE DESC NULLS LAST";
      queryBuilder.setOrderByClause("ORGANIZATION_ID DESC NULLS FIRST, SCORE DESC NULLS LAST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { null, "6" }, { null, "5" }, { null, "4" }, { null, "3" }, { null, "2" },
          { null, "1" }, { null, null }, { "6", "6" }, { "6", null }, { "5", "5" }, { "5", null },
          { "4", "4" }, { "4", null }, { "3", "3" }, { "3", null }, { "2", "2" }, { "2", null },
          { "1", "1" }, { "1", null } });

      // sql="SELECT ORGANIZATION_ID,SCORE FROM "+tableName+" group by ORGANIZATION_ID, SCORE ORDER
      // BY ORGANIZATION_ID DESC NULLS LAST, SCORE DESC NULLS FIRST";
      queryBuilder.setOrderByClause("ORGANIZATION_ID DESC NULLS LAST, SCORE DESC NULLS FIRST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { "6", null }, { "6", "6" }, { "5", null }, { "5", "5" }, { "4", null },
          { "4", "4" }, { "3", null }, { "3", "3" }, { "2", null }, { "2", "2" }, { "1", null },
          { "1", "1" }, { null, null }, { null, "6" }, { null, "5" }, { null, "4" }, { null, "3" },
          { null, "2" }, { null, "1" } });

      // sql="SELECT ORGANIZATION_ID,SCORE FROM "+tableName+" group by ORGANIZATION_ID, SCORE ORDER
      // BY ORGANIZATION_ID DESC NULLS LAST, SCORE DESC NULLS LAST";
      queryBuilder.setOrderByClause("ORGANIZATION_ID DESC NULLS LAST, SCORE DESC NULLS LAST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { "6", "6" }, { "6", null }, { "5", "5" }, { "5", null }, { "4", "4" },
          { "4", null }, { "3", "3" }, { "3", null }, { "2", "2" }, { "2", null }, { "1", "1" },
          { "1", null }, { null, "6" }, { null, "5" }, { null, "4" }, { null, "3" }, { null, "2" },
          { null, "1" }, { null, null } });

      // -------test only one return column----------------------------------

      // sql="SELECT SCORE FROM "+tableName+" group by SCORE ORDER BY SCORE ASC NULLS FIRST";
      queryBuilder.setSelectColumns(Lists.newArrayList("SCORE")).setFullTableName(tableName)
        .setGroupByClause("SCORE").setOrderByClause("SCORE ASC NULLS FIRST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { null }, { "1" }, { "2" }, { "3" }, { "4" }, { "5" }, { "6" } });

      // sql="SELECT SCORE FROM "+tableName+" group by SCORE ORDER BY SCORE ASC NULLS LAST";
      queryBuilder.setOrderByClause("SCORE ASC NULLS LAST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { "1" }, { "2" }, { "3" }, { "4" }, { "5" }, { "6" }, { null } });

      // sql="SELECT SCORE FROM "+tableName+" group by SCORE ORDER BY SCORE DESC NULLS FIRST";
      queryBuilder.setOrderByClause("SCORE DESC NULLS FIRST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { null }, { "6" }, { "5" }, { "4" }, { "3" }, { "2" }, { "1" } });

      // sql="SELECT SCORE FROM "+tableName+" group by SCORE ORDER BY SCORE DESC NULLS LAST";
      queryBuilder.setOrderByClause("SCORE DESC NULLS LAST");
      rs = executeQuery(conn, queryBuilder);
      assertResultSet(rs,
        new Object[][] { { "6" }, { "5" }, { "4" }, { "3" }, { "2" }, { "1" }, { null } });
    }
  }

  @Test
  public void testOrderByNullable() throws SQLException {
    try (Connection conn = DriverManager.getConnection(getUrl(), props)) {
      String sql = "CREATE TABLE IF NOT EXISTS us_population (state CHAR(2) NOT NULL,"
        + "city VARCHAR NOT NULL, population BIGINT CONSTRAINT my_pk PRIMARY KEY"
        + " (state, city))";
      conn.createStatement().execute(sql);

      sql = "select ORDINAL_POSITION from SYSTEM.CATALOG where TABLE_NAME = 'US_POPULATION'";
      ResultSet rs = conn.createStatement().executeQuery(sql);
      int expected = 0;
      while (rs.next()) {
        expected += 1;
      }

      QueryBuilder queryBuilder = new QueryBuilder().setSelectColumns(Lists.newArrayList("*"))
        .setFullTableName("SYSTEM.CATALOG").setWhereClause("TABLE_NAME = 'US_POPULATION'")
        .setOrderByClause("ORDINAL_POSITION");
      rs = executeQuery(conn, queryBuilder);
      int linesCount = 0;
      while (rs.next()) {
        linesCount += 1;
      }
      assertEquals(expected, linesCount);

      queryBuilder = new QueryBuilder().setSelectColumns(Lists.newArrayList("COLUMN_NAME"))
        .setFullTableName("SYSTEM.CATALOG").setWhereClause("TABLE_NAME = 'US_POPULATION'")
        .setOrderByClause("ORDINAL_POSITION");
      rs = executeQuery(conn, queryBuilder);
      linesCount = 0;
      while (rs.next()) {
        linesCount += 1;
      }
      assertEquals(expected, linesCount);
    }
  }

  @Test
  public void testPhoenix6999() throws Exception {
    String tableName = "TBL_" + generateUniqueName();
    String descTableName = "TBL_" + generateUniqueName();

    String fullTableName = SchemaUtil.getTableName(TestUtil.DEFAULT_SCHEMA_NAME, tableName);
    String fullDescTableName = SchemaUtil.getTableName(TestUtil.DEFAULT_SCHEMA_NAME, descTableName);

    try (Connection conn = DriverManager.getConnection(getUrl(), props);
      Statement stmt = conn.createStatement()) {
      conn.setAutoCommit(false);
      String ddl =
        "CREATE TABLE " + fullTableName + "(k1 varchar primary key, v1 varchar, v2 varchar)";
      stmt.execute(ddl);
      ddl = "CREATE TABLE " + fullDescTableName
        + "(k1 varchar primary key desc, v1 varchar, v2 varchar)";
      stmt.execute(ddl);
      stmt.execute("upsert into " + fullTableName + " values ('a','a','a')");
      stmt.execute("upsert into " + fullTableName + " values ('b','b','b')");
      stmt.execute("upsert into " + fullTableName + " values ('c','c','c')");
      stmt.execute("upsert into " + fullDescTableName + " values ('a','a','a')");
      stmt.execute("upsert into " + fullDescTableName + " values ('b','b','b')");
      stmt.execute("upsert into " + fullDescTableName + " values ('c','c','c')");
      conn.commit();

      String query = "SELECT  *  from " + fullTableName + " where k1='b' order by k1 asc";
      ResultSet rs = stmt.executeQuery(query);
      assertTrue(rs.next());
      assertEquals("b", rs.getString(1));

      query = "SELECT  *  from " + fullTableName + " where k1='b' order by k1 desc";
      rs = stmt.executeQuery(query);
      assertTrue(rs.next());
      assertEquals("b", rs.getString(1));

      query = "SELECT  *  from " + fullDescTableName + " where k1='b' order by k1 asc";
      rs = stmt.executeQuery(query);
      assertTrue(rs.next());
      assertEquals("b", rs.getString(1));

      query = "SELECT  *  from " + fullDescTableName + " where k1='b' order by k1 desc";
      rs = stmt.executeQuery(query);
      assertTrue(rs.next());
      assertEquals("b", rs.getString(1));
    }
  }

}
